1. Estimating Digits in quotients

2. Estimation is finding a number that is close enough to the right answer.
You are not trying to get the exact right answer.
Concentrate on the first digit of each number ... it will have the biggest impact on the answer. You can then look at the other digits to make small adjustments to your answer.
Round the numbers up or down

3. To estimate, we round.
*Remember: 5 or more, UP the score
4 or less, let it REST!
Estimate the following:
Nearest ten:
Nearest hundred thousands:
617, ,872
Nearest thousands:
617, ,872

4. Module 2, Lesson 12, page 50
We can use estimation to quickly help us find an approximate answer.
2,970 ÷ *First, round each number off to the largest
place of that number.
3,000 ÷ 10
*Next, cross off the SAME amount of zeros in each number.
300 ÷ 1 =
300 *Last, divide. You now have an estimated answer!
Use a calculator to find the quotient. Compare the quotient to the estimate.

5. Estimate the following quotients.
4,752 ÷ 12
11, 647 ÷ 19
40, 644 ÷ 18
49,170 ÷ 15
You try! Complete p. 53 and 1-5 on p. 54.

6. Dividing Whole Numbers

7. Parts of a Division Problem
divisor
24 ÷ 4 = 6
quotient
dividend

8. Steps To Solve Division Problems
Divide
Multiple
Subtract
Bring Down
Repeat

9. Dividing with a 1 Digit Divisor

10. Solving Problems with 2 Digit Divisors
Round 96 to 100 and 211 to 200 to help decide what number to start dividing with
-192 ↓
192
-192

13. Keri is reading a novel that has 650
pages. She has 25 days to finish the
book. If Keri reads the same number
of pages each day, how many pages
does she read each day?

14. The new baseball stadium holds 64,506
people. There are 26 gates where people enter
the ballpark. The same number of people
entered each gate. How many people entered
the first gate?

15. Lisa solved 448 math problems for homework over 28 days
Lisa solved 448 math problems for homework over 28 days. If she solved the same number of problems each day, how many problems did she solve per day?

16. Luis was in charge of collecting money for a group of charities
Luis was in charge of collecting money for a group of charities. He collected $979 for11charities. If the money was divided evenly, how much was given to each charity?

17. Sandra helped serve meals to 25 families
Sandra helped serve meals to 25 families. Each family received the same amount of food. If she served 275 pounds of food, how many pounds of food did each family receive?

18. Joshua works for a computer company and receives an annual salary of $38,480. He receives 26 equal pay checks during the year. How much does he receive in each pay check?

19. Mike solved the following division problem
Mike solved the following division problem . Analyze his work and determine if he solved it correctly. If it is correct, explain why. If a mistake was made, complete the problem correctly and explain his error.
6 8 0
-2 5 2
3 3 6 -

20. Ashley solved the following division problem
Ashley solved the following division problem . Analyze her work and determine if she solved it correctly. If it is correct, explain why. If a mistake was made, complete the problem correctly and explain her error.
310
-75
250 -

21. Bill completed the following problem. Find his mistake and correct it.
512
-235
564 -

22. Jan completed the following problem
Jan completed the following problem. When she checked her work by multiplying the divisor times the quotient, her product did not equal the dividend. She knows that means there is a mistake somewhere. Find her mistake and correct it.
122
-15 33 30
-30 -
122
× 15
610
+1220
1830